- 12-lead ECG demonstrating QTc >450 msec or a QRS interval >120 msec at Screening. If QTc exceeds 450 msec, or QRS exceeds 120 msec, the ECG should be repeated two more times and the average of the three QTc values should be used to determine the subject's eligibility. Subjects with one of the following currently in the past 6 months: myocardial infarction, congenital long QT syndrome, torsades de pointes or clinically significant ventricular arrhythmias.